This is an problem solving activity with more than one way to represent a solution. I have included solutions/strategies in the teaching notes on the side of the pages. It is designed to stretch students' thinking skills.
I have experience using this problem with students in grades 3-5 but feel it is useable for older students as well. I have even used it at two different parent education nights. It allowed me to demonstrate that a classroom environment where students are engaged in discourse, justification, creative problem solving, and being able to wrap one's brain around another person's mathematical perspective is more valuable than an environment where there is one way, one answer.